钢轨气压焊的回火研究

气压焊是钢轨现场焊接的主要方法之一.新型的移动式气压焊轨机具有焊接质量稳定、焊接速度快、自动化程度高、无油烟环保的优点,适用于新线和既有线的工地、桥梁、随道轨道铺设施工工程单元焊、锁定焊复杂工况.回火是气压焊氧、乙炔混合气体燃烧特有的现象,如何避免回火对提高移动式气压焊轨机焊接效率有很大影响.在分析移动式气压焊轨机气路...

Study on flashback of rail gas pressure welding

Gas pressure welding is one of main methods of rail welding.New types of gas pressure welding engineering vehicle have good quality of welded joints,quick welding and high degree of automation,no fumes and clean,which apply to unit welding,lock welding,bridge,tunnel and other complex conditions of new-built railway and existing line.Flashback is the gas pressure using oxygen and acetylene welding gas mixture burns as a phenomenon peculiar to the heat source.How to avoid flashback has great influence on welding efficiency of the gas pressure welding engineering vehicle.Based on rail welding process parameters requirements,safe use of gas pressure and flow stability requirements,separately from the cylinder connection,flame arrester,mass flow controller to optimize,and then the article propose the way to avoid flashback.